| 摘要 |
The proposed mast (Fig. 1B) consists of a base, ancillary supports (2) attached to the base by joints, to which the main support (1) is attached by joints.The proposed method for the assembly of the mast is as follows: the mast is balanced by means of weights on the ground, then it is raised and secured in a vertical position e.g., by means of a winch in two steps - ancillary supports (2) are raised followed by the main support (1).<IMAGE>
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